Anyone know the answer? I've tried looking for part numbers to match up but haven't found any solid evidence one way or the other. I have the `00 YZ and a buddy has the `01 WR. We went riding the other day and he high sided and slammed the tank into a rather large pointed rock punching a hole in the side of his tank. Weird! At any rate, I have a spare tank the guy I bought my bike from gave me, it's a bigger tank. So I was thinking about giving it to my buddy if it'll fit. He has to get a header and radiator too, so just trying to see if this would work before he orders the parts. If not he'll have to order a tnak too and might as well do one big order. I'd run over to his house now and test it out, but we're not that close in distance.... Thanks ya'all!